Tahoe / Yukon Gas Mileage?

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I'm looking into buying an '07 or '08 Tahoe/Yukon.

Would appreciate any info people are willing to provide in terms of gas mileage.

I've seen the poll that was posted - seems like 14.6-18.5 is the range.

 

Please let me know what you get!

 

Also - please let me know your engine: 4.8L (2WD) or 5.3L (4WD).

 

Any other comments in terms are gas mileage are appreciated.

 

Craig